print("hello python world")
message = "hello"
print(message)


message = "this is  a string"
print(message)
message = 'this is a string'
print(message)
message = "'this is a string'"
print(message)

name = "ada lovelace"
print(name.title())
print(name.upper())
print(name.lower())

fist_name = "abc"
last_name = "def"
full_name = fist_name + " " + last_name
print(full_name.title())

print("a\nb\n")

favorite_language = 'python '
print(favorite_language)
fav = favorite_language.rsplit()
print(fav)

myName = 'cheng xiao qi'
print(myName)
print(myName.lower())
print(myName.upper())
print(myName.title())

print(2 * 4)
print(3 - 2)
print(3 / 2)

age = 23
message = 'Happy ' + str(age) + 'rd Birthday!'
print(message)